 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal.navigator.filters;

 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.internal.navigator.CommonNavigatorMessages;
 import org.eclipse.ui.navigator.ICommonFilterDescriptor;
 import org.eclipse.ui.navigator.INavigatorContentDescriptor;

 /**
  * @since 3.2
  *
  */
 public class FilterDialogSelectionListener implements ISelectionChangedListener {
     
     
     private Text descriptionText;

     protected FilterDialogSelectionListener(Text aDescriptionText) {
         descriptionText = aDescriptionText;

     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
      */
     public void selectionChanged(SelectionChangedEvent event) {

         IStructuredSelection structuredSelection = (IStructuredSelection) event
                 .getSelection();
         Object element = structuredSelection.getFirstElement();
         if (element instanceof INavigatorContentDescriptor) {
             INavigatorContentDescriptor ncd = (INavigatorContentDescriptor) element;
             String desc = NLS
                     .bind(
                             CommonNavigatorMessages.CommonFilterSelectionDialog_Hides_all_content_associated,
                             new Object [] { ncd.getName() });
             descriptionText.setText(desc);
         } else if (element instanceof ICommonFilterDescriptor) {
             ICommonFilterDescriptor cfd = (ICommonFilterDescriptor) element;
             String description = cfd.getDescription();
             if(description != null)
                 descriptionText.setText(description);
             else
                 descriptionText.setText(NLS.bind(CommonNavigatorMessages.FilterDialogSelectionListener_Enable_the_0_filter_, cfd.getName()));
         }

     }

 }

